JPS6032690A - Printing apparatus - Google Patents

Abstract

PURPOSE:To prevent the relative change in the ratio of the gap between a character and a line, by changing the cumalative value of minute feed in a line direction so as to obtain a line feed amount proportional to a column feed amount when the character size of a type unit is changed. CONSTITUTION:Data showing the value of a line feed amount (length), which is obtained from a line feed number indicating signal (1, 1.5, 2 line) and a column feed amount indicating signal (1/10, 1/12, 1/15 inch) inputted to a control circuit 3 from a function keyboard part 2, is stored in memory 4 or outputted to the control circuit 3 from the memory 4. For example, when 1/12 of one line feed amount, when a column pitch is 1/10, is set to the min. unit (f) of a minute feed amount in a line direction, the line feed amount necessary for one line is 12f. When the column pitch is changed to 1/2 inch and 1/15 inch, respective line feed amounts are 10f and 8f and become small in proportion to the change of the column pitch.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an improvement in a line feed (paper feed) device of a printing device.

(Prior art) In the line feed of conventional printing devices, such as electronic typewriters, the line feed amount is changed by operating a reverse switch that is displayed as 11 "d"y" or "2", respectively. ,
Previously, 1 line, 12 lines, or 2 lines were selected, but in the past, 1 line was the absolute amount of line leading, and the number of leading lines was 1/10.
Even if the font size changed from 1/12 inch to 1/15 inch, the amount of feed per line did not change. Therefore, even if the character height changes, the line feed amount does not change, resulting in a relative imbalance between the characters and the spaces between the lines.

(Purpose) This invention was made in order to improve the above-mentioned conventional drawbacks, and the printing bag +i is provided with a fine line feed function, and the cumulative fine line feed allows one line to be printed. When the character size of the type unit changes, it is configured to realize the feed amount, and when the character size of the type unit changes, it corresponds to any of the digit feed pitches 1/10, 1/12, or 1/15 inches, etc., corresponding to the character size. , the purpose is to change the cumulative value of the minute line direction feed so that the line feed amount is proportional to the shift amount, so that the balance of the gap between characters and lines remains relatively unchanged. .

(Example) Hereinafter, this invention will be explained based on the drawings.

FIG. 1 is a block diagram of a line feed system and a control system in an electronic typewriter according to an embodiment of the present invention. 1 is
A keyboard section for inputting information related to printing operations such as characters and symbols on a typewriter, in which A-Z, 0 to 9, various symbol keys, etc. are arranged, and input to the control circuit 3 via a line. . Reference numeral 2 denotes a keyboard section for inputting information regarding forward/backward operations such as space, carriage return, and paper feed, and mode settings such as margin set, tab set, and reset;
Similar to the keyboard section 1, the data is input to the control circuit 3 via the online line 12. This control (b) path 3 includes a read-only memory that converts microinstruction information for sequential control into digital signals, stores them, converts them, and discriminates the information, and performs C arithmetic processing according to information from the read-only memory. It consists of an arithmetic unit that performs calculations, a group of registers that hold numerical data, an adder that performs calculations, and a control unit that performs other controls. 4
is a memory for storing data related to the line feed amount, and is used to store data on the line feed amount from the function keyboard section 2 to the line 12.
A line feed number instruction signal (
L + 1 /, + 2 lines) and shift amount instruction signal (L + 1 /, + 2 lines)
/lo, 1/l 2 or l/15i/chi) is stored or output to the control circuit 3 via line l. . Reference numeral 5 denotes a drive circuit for the line feed motor 6, which converts line feed motor drive signal pulses output from the control circuit 3 via the line 14 into motor drive signals and amplifies the power. 6
is a stepping motor for line feeding, and the drive circuit 5
In response to the number of pulses outputted from line 1 through line 1, the rotational movement is performed by an integral multiple of the minimum feed t, transmitting the rotation to gear system 7, and applying rotational force to platen 9, which feeds paper 8.

A carriage 10 comprising a type unit, a printer, an ink ribbon, etc. is in a state where it can move in the line direction (in the direction of the arrow in FIG. 1) facing the platen 9 to perform printing. - As an example, if 1/12 of the feed amount for one line when the digit pitch is VLO inch is taken as the minimum unit of minute line direction feed amount, 3-f, then the line feed amount required for one line is 121. When the digit pitch changes from 1/12 inch to 1/15 inch/inch, the respective line spacing decreases in proportion to the change in digit pitch, LOf and sf. That is, rzf,t
The cumulative amount of the minimum unit amount of line feed 1, ie, of and sf, corresponds in proportion to the change in digit pitch. In addition, if the line feed amount instruction signal from the function keyboard section 2 is not one line but lk lines or two lines, 12f, LOf, and 8f, which are the cumulative amounts of the minimum unit amount that is the feed amount for one line, are Multiply each value by lk and 2, and if there are 13 lines, 1
8 quantity, 15 quantity, 12f, 24f for 2 lines.

Line spacing amounts of zof and tof are obtained.

FIG. 2 is a flowchart showing the setting of the line feed amount and the line feed operation according to this embodiment. On the function keyboard section 2, - As an example, the line feed needle is 1 line, the line feed pitch is L.
/10, these two signals are input to the control circuit 3 (step t). The control circuit 3 executes arithmetic processing of signals related to row pitch and digit pitch,
Derive the cumulative amount L2f of the minimum unit ■ as the amount of movement, and calculate this value r 1.24
is written in the memory 4 as line leading data, and the set amount of line leading amount is completed (step 2). Various types of normal printing were performed according to the input from the keyboard section 1 (step 3
) Later, when the carriage return or paper feed key is input (step 4), the control circuit 3 reads out the data "12" from the memory 4 and sends a control pulse corresponding to this data via the drive circuit. In step 5), line feed (paper feed) of the set feed amount is output to the line feed motor 6.
Actions are performed (step 6). Part 1. Control again @1
Two latest signals regarding line pitch and digit pitch are input to the circuit 3 from the function keyboard section 2 (
Step 1) Return to standby state.

(Other Embodiments) As an application example of the above embodiment, if an electronic typewriter is equipped with a detection means for determining the type of character size (digit pitch) of the type unit, the digit pitch signal is automatically transmitted to the control circuit. This digit pitch sensor eliminates the need for the user to manually input digit pitch amounts such as L/lo, L/12, and 1/l 5 inches from the function/keyboard section 2, and automatically inputs them. The line feed operation will be executed in response to the change in digit pitch.

(Effects) As explained above, the present invention takes the minute line feed l smaller than the character size as the minimum unit f and is proportional to the print device's feed pitch l/LO, l/12 inch, L/15 inch, etc. Cumulative amount of minimum unit f 12f , tof , sf
etc. can be set for the line leading, so it improves the imbalance of space that occurs between the characters and the space between the lines, where the line leading does not change even if the font size changes, and optimizes the spatial balance. This provides the effect of making it possible to

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a line-feed control system in an electronic typewriter that is an embodiment of the present invention, and FIG. 2 is a flowchart showing the line-feed amount set and line-feed operation of this embodiment. be. 1...Keyboard part 7-2...F/kusho/keyboard part 3-
...... Control circuit 4 ...... Line feed amount data memory 5 ...
... Line feed motor drive circuit 6 ......
Line feed motor 7... Line feed transmission gear system 8...
...Paper 9...Platen 10...Carriage 8-1

Claims (1)

[Claims] In a printing device that is equipped with a minute line feed function that is sufficiently smaller than the character size, and that generates the line feed amount by accumulating the minute line feeds, when the character size of the type unit changes, the ratio corresponding to the change in character size is A printing device characterized in that the printing device is configured to optimize the precision of the line feed by changing the line feed amount.